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Combinatorics Unsolved Problems
Problems you couldn't solve and to which you know that there is a solution (i.e. a problem from a contest, etc.) but you don't know it.
Moderators:
High School Olympiad Moderators
,
darij grinberg
,
freemind
,
Megus
,
N.T.TUAN
,
orl
,
pbornsztein
3680
13218
cardinality of set, gcd
Yesterday, at 11:20 pm
kamil9876
Combinatorics Proposed & Own Problems
Problems that you have already solved and you are interested in second opinions or solutions.
Moderators:
High School Olympiad Moderators
,
darij grinberg
,
freemind
,
Megus
,
N.T.TUAN
,
orl
,
pbornsztein
2308
8379
Difference between num...
Wed Nov 18, 2009 1:11 pm
kevinatcausa
Combinatorics Open Questions
An open question is a question that has no known solution up to this moment, and it is not known wheter the problem has one or not.
Moderators:
High School Olympiad Moderators
,
darij grinberg
,
freemind
,
Megus
,
N.T.TUAN
,
orl
,
pbornsztein
240
807
Triangulated planar gr...
Wed Nov 04, 2009 5:33 am
kweenie
Combinatorics Solved Problems
The problems that were discussed and solved in the topics above are moved here.
Moderators:
High School Olympiad Moderators
,
darij grinberg
,
freemind
,
Megus
,
N.T.TUAN
,
orl
,
pbornsztein
246
1248
colouring the plane
Sat Oct 03, 2009 8:02 am
mavropnevma
Combinatorics Theorems and Formulas
Theorems and Formulas. Some even with proof :)
Moderators:
High School Olympiad Moderators
,
darij grinberg
,
freemind
,
Megus
,
N.T.TUAN
,
orl
,
pbornsztein
92
290
another form of Polya'...
Mon Nov 16, 2009 12:44 am
Storophanthus
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